Safety device for elevators.



W. KEATING.

SAFETY DEVICE FOR ELEVATORS.

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1,099,181 Patented June 9, 1914.

WITNESSES: mm ran .9 l ,v n mm u mm "m I E ummy WILLIAM HEATING, 01 NEWYORK, N. Y.

SAFETY DEVICE FOR ELEVATORS.

Specification of Letters Patent.

Patented Julie 9, 1914.

Application filed June 4, 1913. Serial No. 771,588.

T all whom it may concern:

Be it known that I, WILLIAM Ke ring, a citizen of the United States, anda reardent of the city, county, and State of New York, have inventedcertain newand useful Improvements in Safet Devices for Elevators, ofwhich the fo lowing is a specification, reference being bad to thedrawing. forming a part thereof.

My invention relates to safety devices for elevators and the like, andparticularly to such as are adapted to prevent the starting of the carwhen the car door is open. I

One object of my invention is to provide a safety device of the classabove indicated that shall be effective in operation and comprise a fewsimple arts.

Another object is to provide a device which will automatically preventnot only the starting of the car when the door is open, but also theopening of the door when the starting lever is moved out of its centraloff or stop position.

Other objects and advantages will beset forth hereinafter. l

I will describe my invention in the following specification and pointout the novel features in appended claims.

Referring to the drawings,-F1gure 1 18 a partial elevation of anelevator car equipped with the safety device of my invent-ion. Fig. 2 isan interior elevation at right angles to Fig. l w ich shows the elevatorcontroller and a portion of the safety device. A sectional plan view ofone corner of the elevator car is shown in Fig. 3, the safety devicebeing shown in the position which it is adapted to occupy when the cardoor is open. Fig. 4 is a view corresponding to Fig. 3 except that thesafety device is shown in the position which it occupies when the cardoor is closed.

Like characters of reference designate corresponding parts in all thefigures.

is an elevator car having a door 11 and a controller lever 12, the .owerart of which is covered by a casing 18. he control lever 12 is adaptedto swin backward or forward from a central 0 position to drive the carin an upward or downward direction in a well known manner. Rotatablvsupported over the controller 12 is a shaft .20 which forms 0. art of myimproved safety device. Secured to one end of the shaft is a crank arm21 which is connected to the door 11 by a link 22.

The arrangement of parts is such that a rotative movement of the shaftis produced as the door is opened or closed. A locking bar 24 having avnotch is securedto the shaft 20 intermediate its ends. This bar may beintegral with the shaft or secured to' it i any suitable manner. It isso arranged that it lies in a substantially vertical plane and does notinterfere with the free operation of the control lever 13 when the dooris closed, but the lever 21 and the link 22 are so proportioned that itis swung into a horizontal plane when the door is opened. The notch 25is arranged to receive the control lever 12 in its central off positionand consequently the controller is locked in this position when the dooris open.

The device obviously not only prevents the movement of the lever out ofits off position when the door: is open, but also prevents the openingof'the door when the lever is out of its off position. Therefore, thecar cannot be started in either direction until the car door is shut.

If desired the slot may be of sufiicient width to allow the operator togive an extremely slow movement to the car so that he may overcome anycreeping of the car or may bring it more exactly to the landing level.The locking bar is also so arran ed that the car door cannot be openedan ass the control lever is returned to its off position as a tendenc toopen the door will be opposed by 'the ocking bar 24 pushin against thecontrol lever which is held against any outward movement by its pivotand by the casino 13.

As shown in Fig. 3, one end of tlie shaft 20 may extend through theinside partition wall of the car and the crank 21 and link 22 locatedbeyond this wall or between the inner and outer walls of the car if thecar has double walls. The door may comprise a collapsible grating asshown in Fig. 1 or may slide into its easing or into the car we ls.

Variations in size and arrangement of parts may be effected within thespirit and scope of myinvention and I desire that only such limitationsbe imposed as are indicated in the appended claims.

What I claim is:-

1. In an elevator, the combination with a car, a controller thereinhaving a movable lever adapted to be moved.in oneplane in one directionor the other from an intermediate position, and a door movable in aplane at an angle to the lane of lever movement of a rotatable sha tadjacent to the control lever and parallel to its plane of movement, alocking bar secured to the shaft and having a notch, a crank arm securedto the shaft and a link connecting the outer end of the crank arm to thedoor, whereby the opening of the door swings the locking bar to preventthe movement of the control lever out of its intermediate position.

2. In an elevator, the combination with a car, a controller therein,having a movable lever ada ted to be moved in one direction or the ot orfrom an intermediate ofl position, and a door, of a rotatable shaftadjacent to the control lever and parallel WILLIAM KEATING.

Witnesses:

G. R. QUIMBY, F. B. Gaavne.

Commiutoner of Patents,

Wuhtngton, D. O.

